Pardon me, lets revisit the DDR "hack"
Pardon me, ladies and gentleworms... but I entered this here little board after the discussion about the XSERVE and why its DDR capabilities are a "hack." I will apologize in advance for such tomfoolery, but I am wondering what the real difference is between the "hacked" DDR and true DDR. What does either of them mean in terms of the upcoming PowerMac? Will we see TRUE DDR, and how much will it outperform the hacked DDR?
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Comments
Three words: 'not future hardware'
Remember that the ram can be accessed w/ DMA direct memory access, not using the FSB.
in under the lock
The DDR SDRAM used in the XServe has a clock rate of 133MHz and can transfer 64bits of data twice ("double data rate") per clock pulse, giving it a (theoretical) bandwidth of roughly 2 gigabytes per second, more than the bandwidth available on the CPUs' bus.
A few points:
Correct me if you're wrong, but you sure you don't mean northbridge?
G4s connect to the motherboard via a daughtercard. Or ZIF socket. Or something.